Removes rust and sludge. Clears blocked water channels which causes overheating. Safe for use with rubber hoses and all metals, including aluminium when used as recommended.

Since Douglas Holt first started selling car parts in 1919, the Holts brand has been committed to helping drivers to maintain their cars and keep driving. A British company who develop, test and manufacture products right here in the UK to export across the globe, they're proud of our heritage and place in the automotive industry and rightly so.